The characters have an order known as a collating sequence, which
is the arrangement of characters that determines their sequence order for such
processes as sorting, merging, comparing. XL Fortran uses American
National Standard Code for Information Interchange (ASCII) to determine the
ordinal sequence of characters. (See Appendix B, ASCII and EBCDIC Character Sets for a complete listing of the ASCII character set.)

White space refers to blanks and tabs. The significance of
white space depends on the source format used. See Lines and Source Formats for details.

A lexical token is a sequence of characters with an indivisible
interpretation that forms a building block of a program. It can be a
keyword, name, literal constant (not of type complex), operator, label,
delimiter, comma, equal sign, colon, semicolon, percent sign,
::, or =>.